Valve.



W. H. GURTIN.

VALVE.

APPLICATION FILED FEB. 17, 1911.

1,001,624, Patented Aug. 29, 1911.

Inventor:

WILLIAM H. CURTIN, OF BROOKLYN, NEW YORK.

FFIC

' VALVE.

To all whom it may concern:

Be it known that I, \VILLIAM H. CURTIN, a citizen of the United Statesof America, and residing at Brooklyn, in the county of Y Y lungs andbtate of l\ew 1 ork, have invented certain new and useful Improvementsin Valves, of which the following is a speci fication, such as willenable those skilled in the art to which it appertains to make and usethe same.

This invention relates to steam valves, and the object thereof is toprovide an improvement in such valves over that shown and described inmy Letters Patent of the United States, bearing date of March 14, 1911,and numbered 987,050, and wherein a removable bonnet is shown, thepresent invention being for the purpose of obviating the necessity forsuch bonnet thereby greatly reducing the cost of manufacture of thevalve.

A further object is to provide the double seat for the valve stemwhereby no leakage may occur with the valve in open or closed positionif the stutling-box be removed.

A further object is to provide a detaclr able valve disk for the valvestem which antomatically finds its seat and which is of such diameter asto be adapted to be passed into one of the ports of the valve in theassembling thereof.

A further object is to provide such a disk with a recess, preferablywithinclined walls,

on the under side thereof to receive material of a relatively softnature, such as Babbitt metal or the like.

A further object is to provide a central post in the said recess whichis of angular formation in order to prevent the rotation of the saidfilling material in the disk in the operation of seating the same.

A further object is to provide a mush room head upon the said diskadapted to enter a correspondingly enlarged portion of the valve stem, arecess being provided in said stem of a shape and size approximatingthat of the said head.

. A further object is to provide means for retaining said disk head inposition, comprising a pin or the like, and also to provide a blockserving as aclosure for the open side of the valve stem recess; andstill further objects are to provide such valves which are very simpleand of low cost in construction, which are Well adapted to the purposefor which they are designed, which Specification of Letters Patent.

Application filed February '17, 1911.

Patented Aug. 29, 1911. Serial No. 669,228.

are made of few parts and cannot therefore readily get out of order torequire repair and, with these and other objects in mind, my inventionconsists of a valve as hereinafter fully described and claimed.

My, invention is fully described in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsare designated by the same reference characters in each of the views,and in which Figure 1 is a central section taken through a valveconstructed according to my present invention; Fig. 2 is a fragmentarysection thereof on the line 22 of Fig. 1; and Fig. 3 is a horizontalsection taken on the line 3-3 of Fig. 1. y

In the drawings forming a part of this application I have shown apreferred form of embodiment of my invention, comprising a casing ahaving ports aand a, the latter of which is larger than the former, andthe valve casing is provided with a seat a adjacent the port a said portbeing adapted to be closed by a disk Z) resting on the seat a.

The casin 11 is provided with an internal screw thread w" engaging asimilar thread 0 on a valve stem 0 provided with a handle 0 whereby itmay be rotated, and said valve stem is also provided with two conicalsurfaces 0* and 0 which are adapted to be seated in correspondinglyformed recesses a and a, thereby preventing the passage of steam throughthe valve stem passage of the casing a, and said casing is also providedwith a stufling-box a of the usual or any desired construction. Theconical portion 0'' of the valve stem is continued to form an enlargedhead and is provided with a T-shaped recess a open at one side, as shownin Fig. 2, said open side being adapted to be closed by a block (Z ofthe same external configuration as the head 0 said block being held inposition by means of a transversely arranged split pin W, or itsequivalent, or the pin may be used alone without the block (I ifdesired, the result being practically the same as when said block isemployed.

The disk I) is provided with a recess therein, on the contacting sidethereof, said recess being adapted to be filled with material of arelatively soft nature, such as Babbitt metal or the like, as shown at 6and centrally of the said recess is an integral post or other element 6,preferably of angular shape, to prevent the rotation of the Babbittmetal within the disk, and said post may also be provided with grooves,or the equivalent, to produce shoulders thereon in order to more surelymaintain the'Babbitt metal in position.

The disk 6 carries a post 6 on the upper side thereof and which issurmounted by an enlarged head 6 approximately filling the recess 6 ofthe valve stem, said post being shown of angular formation, but it willbe understood that it may be circular if desired or of any otherexternal configuration, the intent being that it will fit loosely in thehead 0 of the stem, whereby a degree of flexibility results, thusinsuring a positive contact of the disk 6 wit-l1 the seat a.

The disk 6 is of a slightly less diameter than the diameter of the porta and is adapted to be passed thereinto in the assembling of the valve,the valve stem being passed upwardly through the port (1 until the outerend thereof extends beyond the stufling-box a after which the handle 0is placed in position and the stem may be manipulated thereby thereafterand, after the mushroom head of the disk has been placed in the recess0, and the block d placed in position if employed, the valve stem may berotated through an arc of a circle to permit of the insertion of thesplit pin (Z and my valve is assembled and ready for use.

It will thus be seen that my valve does not require a detachable bonnetfor the assembling of the stem and disk therein, thus greatly reducingthe cost of manufacture thereof, the complete valve being justasefiicient, and giving less opportunity for leakage, than if adetachable bonnet were employed, and the cutting of the thread a andvalve stem seats a and a as well as other machining in the, valveinterior is,

' easily possible through the ports a? and a and, while I have shown apreferred form of embodiment of my invention, it will be obvious thatchanges thereover may be made, within the scope of the following claims,without departing from the spirit of my invention or sacrificing itsadvantages.

clined and flared portions of said stem, said outwardly flared flangebeing provided with a T-shaped recess therein, and a valve disk providedwith a mushroom head engaged'in said recess.

2. In a valve, a casing provided with a plurality of ports and having avalve seat formed adjacent one of said ports, a valve stem provided withascrew thread for a portion of its length and being inwardly inclined atthe outer end of said thread and provided witlran outwardly flaredflange at the inner end of said thread, said valve casing havingcooperating seats for the inclined and flared portions of said stem,said outwardly flared flange being provided with a T-shaped recesstherein, a valve disk provided with a mushroom head engaged in saidrecess, and means for holding said disk detachably in said flange.

3. In a valve, a casing provided with a plurality of ports and having avalve seat formed adjacent one of said ports, a valve stem provided witha screw thread for a portion of its length and being inwardly inclinedat the outer end of said thread and provided with an outwardly flaredflange at the inner end of said thread, said valve casing havingcooperating seats for the inclined and flared portions of said stem,said outwardly flared flange being provided with a T-shaped recesstherein, a valve disk provided with a mushroom head engaged in saidrecess, and means for holding said disk detachably in said flange, saidmeans comprising a pin passed through said flange and beneath saidmushroom head.

a. In a valve, a casing provided with a plurality of ports and having avalve seat formed adjacent one of said ports, a valve stem provided witha screw thread for a portion of its-length and being inwardly inclinedat the outer-end of said thread and provided with an outwardly flaredflange at the inner end. of said thread, said valve casing havingcooperating seats for the inclined and flared portions of said stem,said outwardly flared flange being provided with a T-shaped recesstherein, a valve disk provided with a- .mushroom head engaged in saidrecess, and means for holding said disk detachably in said flange, saidmeans comprising a detachableblock closingthe opening in said flange andmeans for locking said block in position. I In testimony that I claimthe foregoing as my invention I have si ed my name in presence of thesubscribing witnesses this 8th day of February, 1911.

WILLIAM H. CURTIN. I/Vitnesses GEORGE I BENTLEY, J. C. LARSEN.

